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US 8,895,927 B2Granted
Detection device, sensor device and electronic apparatus
AssigneeSeiko Epson Corporation
InventorKei Yoshizaki
Life of this patent
Estimating the term…
Abstract
A detection device includes a plurality of pyroelectric elements and a detection circuit. The pyroelectric elements includes a first pyroelectric element through an n-th pyroelectric element serially provided between a detection node and a first power supply node with n being an integer equal to or greater than 2. Each of the first pyroelectric element through the n-th pyroelectric element has a direction of polarization that is set to the same direction. The detection circuit is connected to the detection node.
Claims19
A detection device comprising:
- a plurality of pyroelectric elements including a first pyroelectric element through an n-th pyroelectric element serially provided between a detection node and a first power supply node with n being an integer equal to or greater than 2, each of the first pyroelectric element through the n-th pyroelectric element having a direction of polarization that is set to the same direction;
- a detection circuit connected to the detection node;
- and
- a poling circuit configured to perform a poling process, the poling circuit including a first switch element provided between a poling voltage supply node and a first connection node disposed at one end of the first pyroelectric element, and a second switch element provided between the first connection node and the detection node.
1 more element
A sensor device comprising:
- a sensor array having a plurality of sensor cells with each of the sensor cells including
- a plurality of pyroelectric elements including a first pyroelectric element through an n-th pyroelectric element serially provided between a detection node and a first power supply node with n being an integer equal to or greater than 2, each of the first pyroelectric element through the n-th pyroelectric element having a direction of polarization that is set to the same direction;
- a detection circuit connected to the detection node;
- and
- a poling circuit configured to perform a poling process, in which the direction of polarization of each of the first pyroelectric element through the n-th pyroelectric element is set to the same direction, the poling circuit including a first switch element provided between a connection node and a poling voltage supply node to which a poling voltage is supplied, and a second switch element provided between the connection node and the detection node;
- one or more row lines;
- one or more column lines;
- a row selection circuit connected to the one or more row lines;
- and
- a read circuit connected to the one or more column lines.
7 more elements
A detection device comprising:
- a plurality of pyroelectric elements electrically connected in series between a detection node and a power supply node;
- a detection circuit configured to detect a current in the pyroelectric elements, the detection circuit being connected to the detection node;
- and
- a poling circuit configured to perform a poling process, in which a direction of polarization of each of the pyroelectric elements is set to the same direction, the poling circuit including a first switch element provided between a connection node and a poling voltage supply node to which a poling voltage is supplied, and a second switch element provided between the connection node and the detection node.
1 more element
Dependencies are inferred from the claim text.